US20180056719A1 - Heavy duty tire - Google Patents

Heavy duty tire Download PDF

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Publication number
US20180056719A1
US20180056719A1 US15/672,332 US201715672332A US2018056719A1 US 20180056719 A1 US20180056719 A1 US 20180056719A1 US 201715672332 A US201715672332 A US 201715672332A US 2018056719 A1 US2018056719 A1 US 2018056719A1
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US
United States
Prior art keywords
bead
pneumatic tire
bead core
core
tire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US15/672,332
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English (en)
Inventor
Daniel Austin BISHOP
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Priority to US15/672,332 priority Critical patent/US20180056719A1/en
Assigned to GOODYEAR TIRE & RUBBER COMPANY, THE reassignment GOODYEAR TIRE & RUBBER COMPANY, THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BISHOP, DANIEL AUSTIN
Publication of US20180056719A1 publication Critical patent/US20180056719A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B60C5/02—Inflatable pneumatic tyres or inner tubes having separate inflatable inserts, e.g. with inner tubes; Means for lubricating, venting, preventing relative movement between tyre and inner tube
    • B60C5/04—Shape or construction of inflatable inserts
    • B60C5/08—Shape or construction of inflatable inserts having reinforcing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/04—Bead cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
    • B60C15/0632—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer using flippers in contact with and wrapped around the bead core and, at least partially, in contact with the bead filler
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
    • B60C2015/0696—Asymmetric bead reinforcement, e.g. arrangement of bead reinforcing layer or apex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C2200/00—Tyres specially adapted for particular applications
    • B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles

Definitions

  • This invention pertains to heavy duty pneumatic tires such as are commonly used on earthmoving and mining equipment or heavy vehicles.
  • the present invention relates to tires intended to be fitted to a heavy vehicle, typically in the size ranges of 57 inch radial through 63 inch radial.
  • the tire of the present invention may be used on off highway trucks including dump trucks, rigid frame trucks, large haulage trucks, equipment used for mining, and earthmoving equipment. These off-highway trucks travel across extremely challenging surfaces while typically carrying enormous loads. As a result, the tires on these vehicles are exposed to tremendous forces.
  • the tires of this sort are typically designed with a bead core in the lower sidewall of the tire that has a round, cross-sectional shape. These tires are usually mounted on wheels that have flat seated rims, so that the surfaces of the rim against which the base of the beads are mounted have a rim taper on the order of 5 degrees with respect to the axial direction. Because the tires are subjected to very high loads, it has become apparent that these tires are subject to wear in the bead region. This type of bead wear may be caused by uneven compression under the bead, resulting in uneven wear due to non-uniform shear stress. It is desired to have an improved tire design to reduce the wear in the bead region of the tire, and to reduce the shear stresses in the bead region of the tire.
  • “Aspect ratio” of the tire means the ratio of its section height (SH) to its section width (SW);
  • Bead means that part of the tire comprising an annular tensile member wrapped by ply cords and shaped, with or without other reinforcement elements such as flippers, chippers, apexes, toe guards and chafers, to fit the design rim;
  • Belt reinforcing structure means at least two layers of plies of parallel cords, woven or unwoven, underlying the tread, unanchored to the bead, and having both left and right cord angles in the range from 17 degrees to 27 degrees with respect to the equatorial plane of the tire;
  • “Bias Ply Tire” means that the reinforcing cords in the carcass ply extend diagonally across the tire from bead-to-bead at about a 25-50° angle with respect to the equatorial plane of the tire, the ply cords running at opposite angles in alternate layers;
  • Carcass means the tire structure apart from the belt structure, tread, under tread, and sidewall rubber over the plies, but including the beads;
  • “Circumferential” means lines or directions extending along the perimeter of the surface of the annular tread perpendicular to the axial direction;
  • “Chafers” refers to narrow strips of material placed around the outside of the bead to protect cord plies from the rim, distribute flexing above the rim, and to seal the tire;
  • Chippers means a reinforcement structure located in the bead portion of the tire
  • Core means one of the reinforcement strands of which the plies in the tire are comprised
  • Design rim means a rim having a specified configuration and width.
  • the design rim and design rim width are as specified by the industry standards in effect in the location in which the tire is made.
  • the design rims are as specified by the Tire and Rim Association.
  • the rims are as specified in the European Tyre and Rim Technical Organization—Standards Manual and the term design rim means the same as the standard measurement rims.
  • the standard organization is The Japan Automobile Tire Manufacturer's Association.
  • Equatorial plane means the plane perpendicular to the tire's axis of rotation and passing through the center of its tread;
  • Innerliner means the layer or layers of elastomer or other material that form the inside surface of a tubeless tire and that contain the inflating fluid within the tire;
  • Normal rim diameter means the average diameter of the rim flange at the location where the bead portion of the tire seats
  • Normal inflation pressure refers to the specific design inflation pressure and load assigned by the appropriate standards organization for the service condition for the tire
  • Normal load refers to the specific design inflation pressure and load assigned by the appropriate standards organization for the service condition for the tire
  • “Ply” means a continuous layer of rubber-coated parallel cords
  • Ring means a direction that intersects the axis of rotation and is perpendicular thereto;
  • Ring-ply tire means belted or circumferentially-restricted pneumatic tire in which the ply cords which extend from the bead to bead are laid at cord angles between 65 degrees and 90 degrees with respect to the equatorial plane of the tire;
  • “Section height” means the radial distance from the nominal rim diameter to the outer diameter of the tire at its equatorial plane;
  • “Section width” means the maximum linear distance parallel to the axis of the tire and between the exterior of its sidewalls when and after it has been inflated at normal pressure for 24 hours, but unloaded, excluding elevations of the sidewalls due to labeling, decoration or protective bands.
  • “Turn-up pad” means a strip of elastomer located between the chafer and the turnup end of the ply in the lower sidewall of the tire near the bead general area.
  • FIG. 1 is a cross-sectional view of one half of the tire shown in FIG. 1 shown mounted on a rim;
  • FIG. 2 is a cross-sectional view illustrating a lower sidewall of a heavy-duty tire according to a first embodiment of the invention
  • FIG. 3 is an enlarged cross-sectional view of the bead core of the present invention.
  • FIG. 4 is a cross-sectional view illustrating a lower sidewall of a heavy-duty tire according to a second embodiment of the invention.
  • FIG. 5 is a cross-sectional view illustrating a lower sidewall of a heavy-duty tire according to a third embodiment of the invention.
  • the tire 10 has a carcass 14 which includes a crown region having a radially outer tread 12 disposed over the crown region of the carcass 14 .
  • the outer surface of the tread may further include a plurality of lands and grooves or a plurality of tread blocks and grooves, as commonly known to those skilled in the art.
  • the carcass further includes an optional inner liner 17 that covers the entire interior facing surface of the tire carcass and serves to hold the air or gas mixture that is used to inflate the tire.
  • the inner liner of the tire is typically made of butyl rubber.
  • the carcass 14 further includes a pair of tire sidewalls 18 which extend radially inward from the outer radial surface of the of the tire carcass, terminating in the vicinity of a pair of inextensible annular tensile members or bead cores 16 .
  • the carcass further includes one or more steel cord reinforced plies 19 wrapped about each bead core 16 forming a turnup portion 20 , more preferably an envelope turnup.
  • the portion of the ply which extends from the crown towards the bead and is axially inwards of the bead is referred to as the down portion of the ply or down ply, while the portion of the ply which extends radially and axially outwards from the bead is referred to as the up ply or turnup portion.
  • the one or more plies 19 are oriented in the radial direction. Disposed radially outwardly of the ply 19 in the crown area of the tire is a steel reinforced belt package 21 formed of two or more belts.
  • a pair of sidewalls 18 extend radially inward from the radially outer tread 12 to the bead area.
  • an elastomeric apex 24 Located radially outward of the bead core 16 is an elastomeric apex 24 .
  • the apex as shown may have a triangular cross-sectional shape.
  • Wrapped around the bead core 16 is an optional flipper (not shown). The flipper is preferably located between the bead core 16 and the carcass ply 19 .
  • a chafer 28 Located on the axially inner edge of the bead area.
  • each annular bead core 16 has an asymmetrical cross sectional shape, as the bead core 16 is not symmetrical about an axis X-X.
  • the annular bead core as shown in FIG. 3 has a lower radially inner surface or bead face 30 that has a substantially flat portion 32 .
  • the bead face 30 is oriented at an angle ⁇ that is preferably greater than the taper angle ⁇ of the rim flange, which is typically 5 degrees.
  • the angle ⁇ is preferably in the range of 4 to 9 degrees, more preferably in the range of 5 to 8 degrees.
  • the bead face 30 preferably has a flat surface Lf having a length in the range of 2.5 to 3.25 inches, and more preferably in the range of 2.75 inches to 3 inches.
  • the bead face 30 has angled shoulders 34 , 36 on each side of the bead face that are rounded. The radius of curvature of the angled shoulders is in the range of 0.5 to 0.9 inches, and more preferably, 0.6 to 0.8 inches.
  • the bead core 16 has a maximum bead width W in the range of 3.5 to 4.5, and more preferably 3.75 to 4.3.
  • the bead core 16 has an upper surface 40 that may be parallel to the bead face 30 .
  • the upper surface 40 is preferably flat.
  • the upper surface is joined by an axially-inward and axially-outward angled surfaces 42 , 44 .
  • the upper surface 40 together with the angled surfaces 42 , 44 are arranged to resemble the upper half of a hexagonal bead core. In other words, the angled surfaces 42 , 44 make a ⁇ angle 120 degrees with the upper surface.
  • the radial height hr of the bead core as measured from the radially outermost point to the radially innermost point of the bead core cross-section is in the range of 2 to 3 inches, and more preferably in the range of 2.3 to 2.7 inches.
  • the axial width Wa is in the range of 3.5 to 4.5 inches, and more preferably in the range of 3.8 to 4.3 inches.
  • the ratio of the bead height H to the width W is in the range of 0.4 to 0.8, and more preferably in the range of 0.4 to 0.7, and more preferably 0.5 to 0.6.
  • the bead core 16 is formed from a plurality of wound bead wires, each wire having a size in the range of 2-4 mm.
  • FIG. 4 illustrates an alternate embodiment of the bead core 100 of the present invention.
  • the bead core 100 has an enlarged toe 110 and a rounded heel 120 .
  • the bead core 100 has a flat lower bead face 130 .
  • the extended enlarged toe 110 allows the ply turndown angle to be increased so that it is closer to its deflected shape.
  • the flat lower bead face 130 has a length of 2.5 inches.
  • the flat lower bead face 130 is angled at an angle ⁇ in the range of 4-6 degrees.
  • the width bead core is in the range of 1.5*H to 2*H.
  • FIG. 5 illustrates a third embodiment of the bead core 200 of the present invention.
  • the bead core 200 has a first flat bead face 210 joined with a second flat bead face 220 .
  • the first flat bead face 210 is angled at an angle ⁇ 1 in the range of 10-14 degrees, while the second flat bead face 220 is angled at an angle ⁇ 2 in the range of 4-6 degrees.
  • the bead face 210 , 220 has a dual taper not equal to the rim taper.
  • the bead core 200 has rounded edges 230 , 240 . Axially inner rounded edge 240 transitions to a radial edge 250 .
  • the bead core width is in the range of 1.5 to 2 times the bead height.
  • the bead core 200 has an upper surface 260 that may be parallel to one of the bead faces 210 , 220 .
  • the upper surface 260 is preferably flat.
  • the upper surface is joined by an axially-inward and axially-outward angled surfaces 262 , 264 .
  • the upper surface 260 together with the angled surfaces 262 , 264 are arranged to resemble the upper half of a hexagonal bead core. In other words, the angled surfaces 262 , 264 make a ⁇ angle 120 degrees with the upper surface 260 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
US15/672,332 2016-08-30 2017-08-09 Heavy duty tire Abandoned US20180056719A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/672,332 US20180056719A1 (en) 2016-08-30 2017-08-09 Heavy duty tire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662381149P 2016-08-30 2016-08-30
US15/672,332 US20180056719A1 (en) 2016-08-30 2017-08-09 Heavy duty tire

Publications (1)

Publication Number Publication Date
US20180056719A1 true US20180056719A1 (en) 2018-03-01

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ID=59895033

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/672,332 Abandoned US20180056719A1 (en) 2016-08-30 2017-08-09 Heavy duty tire

Country Status (9)

Country Link
US (1) US20180056719A1 (enrdf_load_stackoverflow)
EP (1) EP3290238B1 (enrdf_load_stackoverflow)
JP (1) JP7009117B2 (enrdf_load_stackoverflow)
CN (1) CN107791748B (enrdf_load_stackoverflow)
AU (1) AU2017216543B2 (enrdf_load_stackoverflow)
BR (1) BR102017018263A2 (enrdf_load_stackoverflow)
CA (1) CA2977122A1 (enrdf_load_stackoverflow)
CL (1) CL2017002174A1 (enrdf_load_stackoverflow)
ZA (1) ZA201705550B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155787A1 (ja) * 2018-02-08 2019-08-15 横浜ゴム株式会社 空気入りタイヤ
US12365204B2 (en) 2021-03-02 2025-07-22 The Yokohama Rubber Co., Ltd. Pneumatic tire and method for manufacturing pneumatic tire

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7238618B2 (ja) * 2019-06-18 2023-03-14 横浜ゴム株式会社 空気入りタイヤ
JP2021000948A (ja) * 2019-06-24 2021-01-07 株式会社ブリヂストン タイヤ
CN110901300A (zh) * 2019-12-17 2020-03-24 江苏三元轮胎有限公司 一种自行车真空胎及其自行车
CN110901301A (zh) * 2019-12-17 2020-03-24 江苏三元轮胎有限公司 一种自行车真空胎、车轮及其自行车

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205883A (en) * 1988-02-23 1993-04-27 The Yokohama Rubber Co., Ltd. Pneumatic tire with polygonal bead core
JPH09188105A (ja) * 1996-01-11 1997-07-22 Yokohama Rubber Co Ltd:The 重荷重用空気入りタイヤ
US5879482A (en) * 1996-03-15 1999-03-09 Goodyear Tire & Rubber Company Run-flat low-pressure all terrain vehicle (ATV) tire
US20050161140A1 (en) * 2003-03-31 2005-07-28 The Goodyear Tire & Rubber Company Tire bead geometry
US20060249237A1 (en) * 2005-05-09 2006-11-09 Hideaki Yoshikawa Heavy duty tire
US20110114239A1 (en) * 2009-11-13 2011-05-19 Gayathri Venkataramani Heavy duty tire
WO2012033121A1 (ja) * 2010-09-08 2012-03-15 住友ゴム工業株式会社 重荷重用空気入りタイヤ

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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DE2715734A1 (de) * 1977-04-07 1978-10-19 Uniroyal Ag Hochbelastbarer fahrzeugluftreifen, insbesondere schlauchlosreifen fuer lastkraftwagen o.dgl.
DE7713948U1 (de) * 1977-05-03 1977-09-29 Uniroyal Ag, 5100 Aachen Hochbelastbarer, auf schraegschulterfelgen montierbarer fahrzeugluftreifen mit einer ringfoermigen verstaerkungseinheit fuer den wulst
US5010938A (en) * 1990-03-30 1991-04-30 The Goodyear Tire & Rubber Company Tire incorporating a bead ring comprising round wire disposed in the shape of a parallelogram
US6651715B2 (en) * 1995-11-29 2003-11-25 Bridgestone Corporation Pneumatic radial tires for truck and bus mounted on 15° drop center rim
US5871602A (en) * 1997-05-29 1999-02-16 The Goodyear Tire & Rubber Company Tire with carcass turn up ends under belt structure
JP4171542B2 (ja) * 1998-08-24 2008-10-22 株式会社ブリヂストン 重荷重用空気入りラジアル・タイヤ
JP2005178668A (ja) * 2003-12-22 2005-07-07 Sumitomo Rubber Ind Ltd ランフラットタイヤ

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5205883A (en) * 1988-02-23 1993-04-27 The Yokohama Rubber Co., Ltd. Pneumatic tire with polygonal bead core
JPH09188105A (ja) * 1996-01-11 1997-07-22 Yokohama Rubber Co Ltd:The 重荷重用空気入りタイヤ
US5879482A (en) * 1996-03-15 1999-03-09 Goodyear Tire & Rubber Company Run-flat low-pressure all terrain vehicle (ATV) tire
US20050161140A1 (en) * 2003-03-31 2005-07-28 The Goodyear Tire & Rubber Company Tire bead geometry
US20060249237A1 (en) * 2005-05-09 2006-11-09 Hideaki Yoshikawa Heavy duty tire
US20110114239A1 (en) * 2009-11-13 2011-05-19 Gayathri Venkataramani Heavy duty tire
WO2012033121A1 (ja) * 2010-09-08 2012-03-15 住友ゴム工業株式会社 重荷重用空気入りタイヤ
US20130139943A1 (en) * 2010-09-08 2013-06-06 Sumitomo Rubber Industries, Ltd. Heavy-duty pneumatic tire

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155787A1 (ja) * 2018-02-08 2019-08-15 横浜ゴム株式会社 空気入りタイヤ
US11241921B2 (en) 2018-02-08 2022-02-08 The Yokohama Rubber Co., Ltd. Pneumatic tire
US12365204B2 (en) 2021-03-02 2025-07-22 The Yokohama Rubber Co., Ltd. Pneumatic tire and method for manufacturing pneumatic tire

Also Published As

Publication number Publication date
JP7009117B2 (ja) 2022-01-25
CN107791748B (zh) 2020-03-13
CA2977122A1 (en) 2018-02-28
CL2017002174A1 (es) 2018-04-20
AU2017216543A1 (en) 2018-03-15
EP3290238B1 (en) 2022-04-13
EP3290238A1 (en) 2018-03-07
JP2018034784A (ja) 2018-03-08
ZA201705550B (en) 2019-06-26
BR102017018263A2 (pt) 2018-03-20
CN107791748A (zh) 2018-03-13
AU2017216543B2 (en) 2023-07-06

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